If your MacBook has the intel processor, you should be able to boot to Puppy just fine and can try any of the versions of Puppy you would like.
But....
If your processor is instead a Motorola processor, there is not yet any version of Puppy that you can use other than doing a search and possibly join in on the development that some are still doing to try to get Puppy to work with a MAC with the Motorola processor.

If your Macbook Pro has an intel processor and a CD or DVD optical drive, you should be able to boot Puppy from it.
I am unsure of if the Macbook Pro has the option to boot from a flash drive.
But with a CD/DVD burnt as multi-session, you could boot from it and save your settings back to the CD/DVD that would be picked up and used on the next boot.
I remember the old version of the OS where one chose the boot medium from the control panel. But I do not know if that included an option for flash drives.

Update the BIOS. If you have 1.1 for example, get the latest update of it. Do NOT get a different BIOS number, you can screw up your computer. After I had done this, boot menus were much easier to use and stopped bugging.

Then install refit.

It may still not work though, USB booting works only on the later computers, and even sD card booting doesn't work on (some?) macs with sD slots.

If your Macbook Pro has an intel processor and a CD or DVD optical drive, you should be able to boot Puppy from it.
I am unsure of if the Macbook Pro has the option to boot from a flash drive.
But with a CD/DVD burnt as multi-session, you could boot from it and save your settings back to the CD/DVD that would be picked up and used on the next boot.
I remember the old version of the OS where one chose the boot medium from the control panel. But I do not know if that included an option for flash drives.

this is true if you are using RW (rewritable) cd/dvd then that will work up until the cd/dvd becomes full. so keep save file small.

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